X-ray machine



Jul 13 192 1,592,279

G. C. LECHENGER X-RAY MACHINE INVENTOR.

ATTORNEYA Mala;

I ZZV/GJZ Z, I

Patented July 13, 1926.

orrso I GILBERT o. Lnoniinonn, or rrousron, Texas.

1 X-BAY MAGI-IINE.

Application filed May 12,

This invention relates to new and useful improvements in X-ray machines, and pertains' particularly to a Buckey diaphragm.

One object of the invention is to provide an attachment for machines of the character specified, working through the usual relay, whereby the circuit through the transformer is automatically completed and broken.

Another object is to provide an attachment through which the movable grid operates to automatically eflect the completing and breaking of the circuit through the primary wires to the X-ray transformer.

With the above and other objects in view this invention has paticular relation to certain novel features of construction, operation and arrangement of parts, an example of which is given in this specification and illustrated in the accompanying drawings, wherein 2- Figure 1 is a fragmentary perspective view of an X-ray machine showing one form of the attachment applied thereto.

Figure 2 shows a perspective view of another form of the attachment, and Fi ures 3 and 4: respectively, show the switches for the respective forms of attachment showing also the wiring connected therewith.

Referring now more particularly to the drawings, wherein like numerals of reference designate similar parts in each of the figures, the numeral 1 designates the framework of the machine which may be of any conventional form. The upper side of this framework is concaved and at each end thereof there are the transverse tracks 2, 2, provided to receive the grooved rollers 3, which are fastened to, and support, the grid 4. The grid is of well known construction to those familiar with this art and a specific description of the construction and use thereof is not deemed necessary, it being sufficient to say that it is formed of a suit F able frame and lengthwise strips of wood and lead, alternately arranged and fastened in said frame.

In making a picture this grid moves transversely with respect to the framework and the plate carried thereby and placed underneath the grid. The patient rests on a stationary aluminum apron which is fastoned onto the framework and located above the grid. Neither the plate beneath the grid, nor the apron, or tube above it, are shown in the drawings as these are convenin opposite directions forming contact points 'the rays while the grid is stationary over 1921. Serial No. 488,893.-

tional parts common to all machines of this character.

Fastened to one end of the grid there is an oblong block 5 formed of insulating mate- 69 rial and fastened to the framework opposite this block is an anchor 6 formed also of insulating material.

In the form shown in Figure 1, the outer face of the block 5 has a counter-sunk strip 7 of metal, such as copper or brass, which extendslengthwise along said block and is centrally located on the outer face thereof. The ends of this strip are turned outwardly 8. In this form there are three flexible 9, 9, 9 fastened to said anchor and of conducting metal, such as brass or copper, one of which is arranged to contact with the strip 7 throughout its entire length, as the grid moves across the frame work above the plate, and the others of which contact successively with the points 8, 8. Current conducting wires 10 are attached to the respective tongues 9 and lead 30 to a relay, three of these wires 10 being employed.

In taking the picture the grid is actuated, preferably by compressed air, across the framework. ()ne of the tongues 9 will ride on the strip 7 throughout its length and the other two of said tongues will contact with the contact points 8 in succession first completing a circuit through the wires 10 and closing the relay switch 14 to complete the circuit through the primary wires 16 leading to the tube and then breaking said circuit through the wires 10 and then again completing a circuit through the wires 10 to open the relay switch to break said circuit through the primary wires, and then breaking the circuit through the wires 10.

It is to be noted that the tongues 9 travel for a distance on the block 5 both before the circuit is completed through the wires 10 to close the relay switch and after it is completed to open said switch; this is necessary inorder to guard against the projection of tongues formed the plate.

In the form shown in Figure 2, the block 5 has a contact plate 11 and the anchor block 6 has two contact tongues 12, 12 to which the two wires 13, 13 respectively are attached. Thesewires 13 lead to the relay witch 17. hen the grid moves the tongues 12 contact first with the block 5 and then with the plate 11 and then again With the block 5. The grid thus moves for a dis tance before the circuit is completed through the Wires 13 to the relay, and after it is broken. During the time the tongues 12 are contacting With the plate 11 the relay switch 17 is closed and a circuit completed to the tube and the rays projected. lVhen the plate 11 moves from under the tongues 12 the circuit through the Wires 13 is broken and the relay switch is open and the circuit through the primary wires is broken.

lVhat I claim is In an X-ray machine, a tube circuit, a relay switch through which the tube circuit may he completed or broken, aswitch circuit, contact tongues carried by the framework of the machine and insulated therefrom, current conductors connected to the respective tongues, a grid movable on the framework, a current conducting element carried by said grid insulated therefrom and arranged to simultaneously contact with said tongues to complete a circuit through said conductors to said relay switch.

In testimony whereof I have signed my name to this specification.

GILBERT O. LECHENGER. 

